Gas range structure



Nov. 3, 1942; B.v PRATT GAS am@ sTRucTuRE 5 Sheets-Sheet 1 Filedv Dec. 29, 1938 Nov) 3, 1942. a'PRATT 2,300,961

y @As RAME STRUCTURE .Filed Dec. 29, 19:58 5 sheets-gnat -2 Nov. ls., i942, B. PRATT 300ml GAS RANGE sTxUcTURE Filed Dec. 29, 1938 5. Sheets-Shee'c Nov.: 3, 1942. s. PRAT-r 2,300,961'

GAS RANGE STRUCTURE Filed Dec. 29, 1938 5 Shetsushelet4 I v f zii; 293W l j Ilya 7"73 /f/l /f/l/Z l, Q 255cv Nw. 3,I 1942; E.Y PRA-rif ,Y .2,300,961 l GAS 'RANGEQSTRUCTURE Y File@ ns. 29, was u 5 snags-sheet 5 burners 8 and 9 and rear burners I0 and il.

Patented Nov. 3, 1,942

- UNITED STAT Es PATENT OFI-lA css RANGE STRUCTURE 7 Best Pratt, Chicago, lli., assignor to Brake Equipment Supply ompany, Chicago, Ill.,

a corporation o! Illinois Application December 29, 19.38, Serial No. 248,337 1 Claim.' (Cl. 251-165) The present invention relates to gas range structures.

The principal objects of the invention are to box tted with devices of the present invention. e

Figure 2 is a side elevation of the structure shown in Figure 1.

Figure 3 is a vertical sectional view on the line 3 3 of Figure 2.

head I2 which receives a mixture of gas and primary air through a single mixing tube I3. The iront burner 9 is a double burner and comprises a main burner head I2 and a simmer burner head Il, each o! which burner heads isv adapted to receive gas and air through a separate passage in a v double mixing tube I5. The two rear burners I and II are both double burners, burner I0 con- Figure 4 is a plan view otra front and rear burner assembly.

Figure 5 i's a vertical sectional view on the line 5--5 of ,Figure 4.

Figure 6 is a vertical sectional View on the line e-of Figure 4.

Figure 'I-is a vertical-sectional view on the line "i-1oi'Fi'gure4.

Figure 8 is a plan view oi a valve and manifold structure.

Figure 91s a front 'view of the structure shown in Figure 8. I

Figure 10 is a rear view of the structure shown in Figure 8. Y

Figure 1l is a vertical sectional view on the lline II-II of Figure 10.

Figure 12 is a sectional view on the line I2-I2 'of Figure 8 and also on the line I2--I2 of Figure Figure 13 is a horizontal sectinal view on the linen- I3 oi Figure-9. Figure 14 is a verticalsectional view on the angled line ll--It of Figure 13.

vFigure 15,15 a vertical sectional view on the line II--Ioi Figure 13.

Figure 16 is a vertical sectional view on the line Iii-#I6 of Figure 15. .A

Figures 17 to 20 are front views diagrammaticallygshowing the various positions of the valve of the present invention.

Figure 21 is a rear view of the valve body or iace plate of the present invention, Vand Figure 22 is an elevation of the seat face of the valve disc or element used with the valve structure of the present invention. d The structure for use ln a gas range burner box illustrated 'in Figures 1 and '2 includes irvlolnt e sisting of a main burner head I2 and a simmer burner head I4, each of which separately receives gas and air through a double mixing tube I8. Rear burner I I comprises a main burner head im and a simmer burner I4, main burner I2a being of a l'orm slightly diierent from the main burner head I2. l

The three main burner heads I2 used in the iront burners and one rear burner of the Figure 1 assembly are of the construction illustrated in vertical -section in Figure. As shown inthe latter figure, each head I2 includes a base plate I8 and' a burner body I9. The basev plate I8 is in the form of a flat ring including a downwardly thickened portion or boss 20 adapted to bear upon the upper surface ofY a mixing tube as hereinafter described. The burner body I9 is annular and of generally inverted U-shaped form in radial section with the outside surfaces of its lower edges ofl such diameter that itwill overlie and fit upon the upper surface of the base plate IB. The outer circumferential wall 22 of the burner body Ii, is

inclined slightly inwardly from. its lower. edge and is inwardly oiTset nearer its upper portion to provide a rounded shoulder 23. Jet ports 24 are circumferentially spaced about the outer wall 22 in a'single line andimmediately above the oset.v

and rounded shoulder 23. Each of these ports extends through the wall 22 at an angle of about 10 above the horizontal, with the outer or jet end uppermost. 5

. The inner wall 25 of burner body I9 is substantiallstraight to a point approximately` midway of .its height and merges into an outwardly curving portion 26 which forms the upper portion of the burner body and joins the rounded upper portion of the outer wall 22. By the above arrangement, any substance which may drop upon the upper portion of the burner during cooking will usually be directed down the inner and blank wall 2B thereof so as not to clog the burner jet ports 24. Because of the steepness of the outer wall-22, any substance which might move downl the same will move directly past the jet ports 2l., The slight upward inclination o t the jet 'ports 24 .iront burner 8 consists of a single main burner 55 will cause the ring of llame formed by the sarna to be of proper diameter and to extend upwardly about the periphery of the burner.

As best shown in Figure 1, outwardly extending securing lugs '28 are circumferentially spaced about the lower edge of the outer wall 22 of each burner body I9, the lugs 28 being arranged to be aligned with lugs 29 which project outwardly from the burner base plate I8 as indicated in Figure 2. The lugs 29 on the burner plate are threaded to receive a machine screw 30 in a manner similar to that illustrated in Figure 6.

' As shown in Figure 5, each burner base I8 has an opening 35 extending through its thickened portion or boss and through which gas may iiow into the burner. This opening, illustrated in plan by dotted lines in Figure 2, is of such outline as to be a` portion or segment of an annulus.

L.v the burner is intended to be lighted by a pilot light or from a simmer burner, a radial slot 36 (Figure 5) is provided in the base plate 20, preferably substantially diametrically opposite the gas supply aperture 35, and the outer wall 22 of the burner body I9 associated therewith is similarly slotted as at 39. By this arrangement, when gas issues from the burner Jet burner I4 will receive an adequate supply of The other front burner illustrated in Figure l; namely, the burner 9, includes an annular main burner head I2, including a burner base plate I8 and a burner body I9, such-as shown in detail in Figures 5 and 6. The burn'er 9 also includes a central simmer burner head I4. Main 'burner head I2 and simmer burner head I4 are fitted upon a double mixing tube I5 of the type disclosed in detail in my above identied dlvisional application entitled Mixing tube structures and comprising a main burner mixing tube or passage I3a and a passage 15 leading to the seat for thesimmer burner I4. Throughout the greater portion of its length, the passage 15 extends parallel with the passage I 3a leading to the main burner, but justforwardly of the outlet chamber 54a of the passage I3a, the passage 15 is directed outwardly at right angles and opens through a port 16 to an open ended chamber 11 havingan inwardly projecting annular flange 18l at its lower end. 'I'he inner edge of ange 18 is threaded to receive the lower and threaded end 19 (Figure 5) of a simmer burner As shown in Figure'5, the simmer burner cap 80 is of sleeve form and includes an outwardly extending ilange 8| at its upper end having ports 82 circumferentially spaced about the' same to form upwardly directed simmer flame Jets. The

:let apertures 82 are inclined very slightly outwardly from the axis of the cap 80 to spread the ring of flame produced thereby.- Gas entering the chamber 11 will circulate between'the wall of the chamber and thesleeve portion of the jet T'cap 80^and move upwardly through the jet ports llt will be noted from 'Figure 5 that the jet 75 secondary air, this supply being further assured by the construction of the double mixing tube shown in Figures 4 and 5, wherebyupward movement of air about the simmer burner I4 is only prevented in the area occupied by the right angled portion of the mixing tube 15, and

by the tongue 84 which may be provided in casting to connect the chamber 11 to the forward wall of the outlet chamberV 54a of the mixing tube I5. The annular form of the simmer burner further assures an ample supply of secondary air through its central passage.

The fact that the simmer burner cap is spaced inwardly from the inner lwall 25 of theannular main burner prevents any substance which might now down along the wall 25 from dropping upon the jet plate of the'simmer burner. It will also be noted from Figure 5 that the simmer burner jet plate is above, or bears on, the mixing tube top wall," so that any substance which might drop from th'e inner wall 25 of the main burner and onto the upper wall of the, mixing .passage 15 or the tongue 84 will flouoif these surfaces and will not flow into tlie simmer burner jet ports.

The manner of securing a rear main burner I2 and a simmer burner I4 to the mixing tube I5 will be apparent from the above description of the front burner 9.

The double burner I I shown'in the lower righthand portion of Figure-f1' differs from the rear double burner I0 shown in the upper right hand portion of this figure* only in that the main burner body 19a included inl burner Il is'des'igned to produce a smallerflame thanithe burner body I9 of burner I2.

As shown in side elevation in Figure 2 and in cross-section in Figure 3, t e outer wall 22a oi burner body 19a of burne I2a curves or bends inwardly from its lowermost portion and forms a shoulder 23a intermediate the height of the burner. From this point upwardly, the wall 22a is substantially vertical and merges with the in-v ner wall 25a which curves downwardly to a vertical portion 26a. The jets 24a ofthe burner body are positioned above the shoulder 23a and since this portion of the burner body is of reduced diameter, the flame' produced may, with.

usual gas now adjustment, b e somewhat lower in B. t.A u. output than the Vburner body I9 of Figure 5. For example, the -burner body ot Figure 5 may be operated with an output of 12,000 B. t. u., whereas the burner body I2a of Figure 3 may be used for @9,000 B. t. u. output. It will be noted that since the burner bodies I9 and. I9a

s accuser.

of the burner bodies, results in a better mixing of air with theV gas, and better combustion.

Each of the main burners l2 and |2a is tted with slots ss and u of the type illustrated in Figure 5 so that these burners may be ignited from a flame produced by their corresponding simmerburners |4. The simmers burners are adapted to be ignited from a pilot burner which receives gas through a suitable supply line' |2`| extending from the gas stove manifold |22. The pilot burner |20 extends upwardly into a housing |23 which is open at its upper and lower ends. Flame-conducting tubes |24 xed to housing |23 radiate from the latter, one extending to burners in the range burner box. The manner in which a ame conducting tube |24 communicates with a double burner is best shown in Figure 6 and, as'there indicated, the open end |25 of the flame-conducting tube is positioned directly in alignment with a small aperture |25 in the outer wall of the simmer burner. vBy this i arrangement when gas flows to the simmer burner, a portion of the gas will be directed through the aperture |25 to the adjacent end |25 of the flame-conducting tube |24. The gas moving through the latter tube will 'be ignited at the pilot burner |20 and the resulting `flame will'issue from the outer end of tube |24 to ignite the gas issuing from the simmer burner jets 82. If the gas-controlling valve has been or is then operated to deliver gas to the main burner, some of the gas entering the main burner will owfrom the slot 38 in the burner base plate |0and be 3 be fitted to each burner box of this type of range.

Figures s to 22 relate to the manifold .|40 and the valve `structures included inthe assembly of Figure 4. Referring particularly to Figures 8, 12, 13 and 15, it will be observed that the manifold |40 is a hollow or box-like casting including a rear wall |5| and a front or face wall |52, these walls being joined at their edges by a continuous wall generally indicated by the numeral I 53 so as to' provide a chamber |54 within the casting.

Chamber |54 is positioned at the center of the casting and includes at least two lateral extensions |55 which, as shown in Figure 12, are bounded at their edges by the casting edge wall |53 and two solid or web portions |55 of thecasting.

A gas supply pipe or main `|55 opens to the chamber |54 through the rear wall |5I to deliver gas to the chamber. The gas thus received in the chamber |54 may flow to a pilot burner tube |2| threaded in a port |50 in the rear wall |5I of the manifold. Such flow to the pilot tube threaded through thefront wall |52 of the manifold and adapted to be held in adjusted position-by a lock nut. It will be observed that this arrangement permits the pilot gas flow to be readily adjusted after the manifold has been positioned on the range. Gasreceived in chamber |54 may also flow into the lateral extensions |55 thereof and, 'as shown in Figure 12, a port |55a ignited by the simmer burner, this flame moving tion, as is the case with the burner 5 at the lower v left-hand portion of Figure 1, the burner body` |5 `is so positioned upon the gas mixing tube I3 that the igniting slot 39 thereof will be directly opposite the outer end of the adjacent name-conduct- -ing tube |24. Thus, when gas flows to the single main burner comprising the burner 5, some gas will issue from the slot to be ignited by the flameconducting tube |24 in the manner described above, and the main burner will thereby be ig- Figure 4 shows a front and rear assembly of double burners, of the type described in connection with Figures 3, 5 and 6, the front burner being connected to a d ouble air mixing tube I5 and the rear burner being connected to a double mixing tube |5.` The two mixing tubes receive gas from a manifold and valve structure |40 pro vided with two double valves. A pilot vburner |200. is positioned centrallyA of a pilot housing` l2 3a which includes a flangel |45 whereby it may be--bolted to the top surface of the double mix- *ingtube I5 as shown in Figure 7. A pair of name-conducting tubes |24 project to the two burners to ignite the same in the manner described above in connection with Figures 1 and 2.

The installation shownin Figure 4, comprising `two burners, and one or both of which may be single burners, is particularly adaptedfor use in a burner box of the type of range'which has a burnerbox at each end thereof and with the oven between the two burner boxes. Obviously an installation such as illustrated in Figure 4, and including the manifold structurev |40, 'can is provided in the' front wall |52 opposite each extension |55 so that gas may move through this port into a chamber |5| provided upon the inner side of a faceplate orvalve body |52 se'- cured to the front face |52' of the manifold |40.

` As best shown in Figure 21, 'each face plate |52 I comprises a front wall |53 and rearwardly projecting and continuous edge walls |54. Three chambers are provided in the rear portion of the face plate or valve body' |52. By the preferred construction, a dividing wall |55 extends substantially directly between iagonaliy opposite portions of the edge wall I5 to form a chamber |55 between one side of the diagonal w'ali |55 and the oppositely disposed portions of the Vedge wall |54. The space between the opposite side of the diagonal dividing wall |55 and the opposite portions of the edge walls |54 is divided by a diagonal wall |51 to form two smaller chambers |5| and |55. In the present arrangement, the face plate |52 is so positioned upon the front wall |52 of manifold |40 that the port |55a in the manifold will open to face plate chamber |5I. The'front wall |53 of the face plate |52 has a supply port |50 therein opening to chamber 15| while the portion of the wall |53 included in chamber |50 has a simmer port |1| therein, an l the portion of wall |53 included in chamber |55 has a main burner port |12 opening through the y same.

As indicated in Figures 14 and 21, the ports |50, I1| and |12 are arrangedon an arcuate line having its axis concentric with a. socket |15 in the front wall of the face plate |52, this socket V being located at the point at which the webs |55 and |51 converge so that the socket doesA -not open into any of the chambers of the face plate.

Each face plateV or valve body |52 is sol positoned on the manifold |40, as shown in Figure 14, that the chamber |55 and the chamber |55 will be positioned opposite the web or solid portion |55 of the manifold. By this arrangement,

a port |16 extending from the front face tothe rear face of manifold |40 and through the righthand end (Figure 14) of each web |56 of the manifold will open at one end to valve body chamber |66. Thus, valve body port |12, valve body chamber |66 and manifold port |16 form a passage through the valve body and manifold, the rear end of this passage opening to a jet fitting |11 which may project into a main burner mixing tube. A port |18 extending from the front face to the rear face of manifold |40 and through the left-hand portion of each web |56 -opens to valve body chamber |68, thereby completing a passage which includes the valve body port |1| A jet lttin'g |19 is threaded in the rear end of manifold port |18, which fitting may des liver gas to a simmer burner mixing tube. As

stated above, face plate (or valve body) chamber |6| is positioned opposite the opening 55a of the manifold 40. v

A valve stem |80 has its inner end seated in the valve body socket and the valve stem carries a valve 8| which is of disc form and, as best shown in Figure 22, is provided on its inner seat face |82 with an arcuate groove |83. Ro-

tation of the valve disc |8| with the valve stem |80, as hereinafter described, is adapted to cause the groove |83 to bridge the portsy |10, |1| and |12 in the face plate or valve body |62. A short arcuate groove |84 of substantially smaller cross section than groove |83 joins one end of the latter groove. y

A flanged cup-shaped housing |90 including an outer plate-like wall |9| is xed to the front face of face plate or valve body |62, housing |90 completely enclosing the valve element or disc valve |8|. Housing |90 has a sealed fit upon the valve body |62 so that it may be lled with grease to lubricate the valve. A bowed spring |92, preferably cruciform, is positioned within the housing |90 with its bight or central portion surrounding the valve stem |80 and bearing upon the housing wall |9|, and with the ends of its arms bearing upon the outer face of the valve disc |8|.

An outer housing |93 of the same form as inner housing |90 fits over the latter housing. Housing |93 is of greater depth than the inner housing so that a space will be provided between the l plate-like outer wall |93 of outer housing |93 and the plate-like wall |9| of inner housing 9|.

The two housings include flanges at their inner ends of square outline and screws |93a extend through` the corner portions of these flanges and through apertures in corner portions of the valve body elements |62 into threaded sockets in the manifold |40. Gaskets of properly cut-out form are preferably interposed between eachvalve body or face plate |62 and the manifold |40 and between the flange o1' each inner housing |90 and the outer surface of the corresponding faceplate or valve body |62. The plate-like portions of both housings |90 and |93 have central apertures therein through which thevalve stem |80 extends. .n

The inner end of valve stem |80 includes a iiattened portion uponwhich .the valve disc |8| ts so that the latter will rotate with the stem. Immediately adjacent the inner surface of platelike wall |93' of outer housing |93, valve stem |80 has a flanged member |95 fixed thereto, which flanged member is substantially flat but of U-shaped form in cross section, as shown in Figure 13, so that it embraces a radially projecting arm |96 which is slidable upon, though -preferably also keyed t0, the valve stem |80. A

coil spring |91 is positioned between arm |96 and the central portion of the plate-like wall |9| of the inner housing |90, spring |91 thereby serving to hold the valve stem |80 and the arm |96 outwardly.

As shown in Figures 13 and 15, the outer portion of valve stern |80 may be of larger diameter than the portion inwardly of the flange member |95, and the outer end may be flattened so that an operating knob may be secured thereto. Arm |96 is provided at'I its free end with a lug |99 from which projects a nub 200 as shown in Figure 15. 'I'he outer'housing 93 is provided with a relatively large aperture 20| with which the locking arm |96 will be aligned when the valve disc |8| is in position to close off ow of gas and, at this time, the lug |99 will project through aperture 20|. Apertures 202 and 203 nare also provided in the plate wall of the outer housing |93 on an arcuate line concentric with the valve stem |80, these two apertures being only sufficiently large to permit the nub 200 to project through the same and being respectively positioned at the points along the path of movement of arm 96 at which the valve willy permit flow to the simmer burner alone, and to both the simmer burner and the main burner.

In the closed position of the valve |8|, the arm |96 will contact with a stop pin 205 which projects inwardly from the plate-like wall |93 of outer housing |93. Movement of the arm |96 in the opposite direction is limited by contact with a shoulder 206 on a plate 201 adjustably secured to the inner surface of the plate-like wall of the outer housing |93 by means of a set screw 208 adapted to extend through an arcuate slot 209 in the plate-like wall. The limit .of movement of the valve stem |80 and valve |8| in this direction may thereby be adjusted.

in Figures 8 to 22, because of the fact that the valve body or plate elements |62 are removable as to conform with different range designs.

with respect to the manifold |40, the valve body elements may be so tted upon the manifold For example, if it is desired to have both of the simmer burner jets |11 leadfrom adjacent sides 0f the two valve bodies, it is only necessary to turn the valve body |62 shown at the right in Figures 12 and 13 through a movement of 180 l when fitting the valve body upon the manifold. The structure is therefore readily adaptable to different conditions. However, in originally assembling the valve structure for a given range, it is desirable to insure that each valve body |62 will be restored to proper position thereon if subsequently removed, as by using a larger diametered -bolt |93a at one corner of each valve body. as shown in Figure 14.

Use of the removable and planar valve body elements is also advantageous because each such element can be readily and economically machined to provide a properV valve seat surface thereon, whereas if a manifold casting is used as a valve-body, the proper machining of the same, as well as the casing thereof; involves considerable expense.

In the operation of the valve, with the valve bodies |62 positioned on manifold |40 as shown in the drawings, the valve disc |8| will completely close now of gas when it is in the position illus,- trated in Figure 17. In such position, the arcuate groove |83 is out of alignment with the valve body port |60 which opens to the opening |55'a in the front wall of the manifold. Flow of gas through the valve will thereby be shut oir. At this time, the locking arm |96 of the valve stem will be in contact with the stop pin 205 as shown in Fig e 16 and the lug |99 will engage the apertur 20| of housing |93 as shown in Figure 15.

In order to obtain flow of gas to a simmer burner, valve |6I is rotated in a clockwise direction from the position of Figure 17 to the position of Figure 18. Such movement will cause the large arcuate groove |83 of the valve discto bridge the valve body ports |60 and |1| so that gas will now flow from of manifold |40 and through the opening |55a of the manifold front wall to the chamber |6| of the valve body and thence through supply port |60 into the arcuate groove |83 of the valve member and thence through valve body port |1l into valve body chamber |68, which opens to port h |18 of the manifold andgas nipple |19. When the valve element |83 is in the position oi Figure 18, the nub 200 of locking arm |96 will engage the small aperture 202 about a housing |93 so that the valve stem cannot be accidentally rotated.

Clockwise rotation of the valve disc |83 from the position of Figure 18 to that of Figure 19 will cause gas toflow into the valve disc groove |83 as described above in connection with Figure 18 and to flow outwardly through valve body port |1| as also described in connection with Figure 18 and, in addition, to flow through valve bodyA port |12 which opens to valvelbody chamber |66. Valve body chamber |66 opens to bore |16 of the manifold |40, which bore communicates with the gas nipple |11. Gas will therefore flow to both the simmer burner and the main burner. ln this position of the disc valve |8| the nub 200 of arm |96 will fit the aperture 203 of outer housing |93.

Continued clockwise rotation of valve disc |8| from the position of Figure 19 to that of Figure ZQwili'cause the large arcuate passage or groove in the-"valve dscf ISI' to move out of alignment with; the gas supply por-t |60, and will bring the reduced groove |84 into alignmentvwith the supbe a reduced |11 and |19 ply port |60. As a result, there will iiow of gas to both of the nipples 'communicating with the respective burners. In

this latter position of the valve, the |96 on the valve stem will contact with stub shoulder 206 illustrated in Figure 16. By having the plate 201 which carries stub shoulder 206 adjustable circumferentially of the outer housing |93, the limit of rotation of the valve disc |8| can be adjusted so that flow cannot beso reduced as to prevent a continuing flame stop arm at the burners.

the central chamber |54 It will be observed that the valve and manifold structure of Figures 8 to 16 c'an be readily adapted for use with a single burner by simply plugging either the bore |16 or the `bore |18 and positioning the remaining elements accordingly. Subject matter disclosed but not claimed herein is claimed in my divisional applications for Mixing tube structures and burner structures, led March 27, 1941;

The terminology used in the specification is not intended to limit the invention, the scope of the invention being indicated in the following claim.

I claim:

'A valve structure for gas ranges comprising a valve body, a disc-like valve rotatable upon one face of said valve body, said valve and valve body having ports therein adapted to be placed in communication upon rotation of said valve, a stem rotatable in said valve body and to which said valve is keyed, a cup-shaped housing secured to said valve body to enclose said valve and including' an aperture through which said stem extends, a spring between said housing and said disc valve to maintain the valve seated, a second cup-shaped housing secured to said valve body and enclosing said rst housing, cooperating means on said valve stem and second housing and entirely within said second housing to hold the valve in adjusted position, and spring means between said housings to hold the engaging means on said valve stem in engagement with the engaging means on said second housing. l

BEST PRAI I.

the fixed y 

